Power distribution unit



FIG. 1 is a perspective view of the top, front and left side of a power distribution unit according to the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a right side elevation view thereof with the left side being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The article as seen from the rear forms no part of the claimed design and the broken line showing is included for the purpose of illustrating the environment structure only and also forms no part of the claimed design. 

The ornamental design for a power distribution unit, as shown and described. 